If everyone thought before they spoke, the world would be a lot quieter.
Your thoughts create your universe; you are the ruler of your thoughts. You are the thinker of your thoughts. If a thought comes in and you do not like it, dismiss it. Do not give it any more attention. Spend the majority of your time thinking good thoughts, having good intentions and see your world change for the better.
The only limits you have are the ones you place upon your self.
Release the chains and set yourself free!